Department of Chemistry, Integral University, Lucknow 226026, Uttar Pradesh, India.
Department of Applied Chemistry, Zakir Husain College of Engineering and Technology (ZHCET), Aligarh Muslim University, Aligarh 202002, India.
J Nanosci Nanotechnol. 2020 Oct 1;20(10):6475-6481. doi: 10.1166/jnn.2020.18591.
Highly crystalline bare and N-doped SrTiO₃ nanoparticles were effectively synthesized with strontium acetate, titanium isopropoxide, hexamethylenetetramine as precursor via citric acid assisted hydrothermal process followed by calcination. The hydrothermally synthesized bare and N-doped SrTiO₃ NPs possessed monodispersity throughout with particle size diameter 50±5 nm but because of annealing at 750 °C temperature the synthesized NPs got agglomerate which created rough surface and induces oxygen vacancy in the NPs. Introducing N ions impurity into SrTiO₃ lattice tailored the electronic band structure of SrTiO₃ and extends its absorption into the visible region. It would display the p-type conductivity and facilitate the photoinduced electron-hole pairs towards respective site which diminishes the chances of recombination of electron-hole pairs that enhances photocatalytic degradation reaction. The results showed MB degraded about ~88 in just 140 min and followed first order reaction kinetics with rate constant = 0.01489 mint.
采用醋酸锶、钛异丙醇、六亚甲基四胺为前驱体，通过柠檬酸辅助水热法合成了具有高结晶度的裸态和 N 掺杂 SrTiO₃ 纳米粒子，然后进行煅烧。水热法合成的裸态和 N 掺杂 SrTiO₃ NPs 具有单分散性，粒径直径为 50±5nm，但由于在 750°C 温度下退火，合成的 NPs 发生团聚，形成粗糙表面，并在 NPs 中诱导氧空位。将 N 离子杂质引入 SrTiO₃ 晶格中，调整了 SrTiO₃ 的能带结构，并将其吸收扩展到可见光区。它将表现出 p 型导电性，并促进光生电子-空穴对分别向各自的位置移动，从而减少电子-空穴对的复合几率，提高光催化降解反应的效率。结果表明，MB 在 140 分钟内降解了约 88%，并遵循一级反应动力学，速率常数为 0.01489 min。
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